In the experimental method,the investigator manipulates a variable under carefully controlled conditions.What does the researcher do next

A)  correlate the resulting behaviour 
B)  survey participants to learn their assessment of the variable 
C)  observe whether any changes occur in a second variable 
D)  observe behaviour in its natural environment

Controlled Conditions

Situations or experiments where all variables are managed or regulated to isolate cause and effect relationships.

Second Variable

In research or mathematics, a variable typically referred to after the independent variable, which can be manipulated or measured to observe its effects on the dependent variable.

Resulting Behaviour

The actions or reactions that occur as a consequence of specific stimuli, events, or conditions.